The sequel to Divergent is reportedly about to add some extra muscles with the leading men caught getting their workouts on.

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On Thursday, Daily Mail posted photos of Theo James, who plays Four in the film, as he was on his way to the gym. He was spotted wearing a grey T-shirt with black gym shorts and sneakers as he added headphones around his neck.

He reportedly happened to have a copy of the book The Fault in Our Stars with him. The movie version stars his Divergent co-star Shailene Woodley.

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While James was on his way to keep up with his exercises, Miles Teller, who plays Peter, was caught in the process of adding more muscles to his body. He's seen in a black tank top and shorts as lying down on a bench and lifting weights, giving a breath and listening to music.

This gives the impression that the actors are likely going to be extra buff for Insurgent, the sequel that follows Divergent.

It was also announced from Entertainment Weekly that Daniel Dae Kim from Lost would join the cast. Other recent cast members include Naomi Watts and Octavia Spencer.

Woodley recently had an interview with Time where she revealed that she does not consider herself to be a feminist.

"I love men, and I think the idea of 'raise women to power, take the men away from the power' is never going to work out because you need balance," she said.

Insurgent is expected to hit theaters on March 20, 2015.

Tags: Insurgent Movies Theo James Miles Teller